Performance Comparison Between High-pressure Sodium Lamps And Solar LED Street Lamps
Traditional high-pressure sodium street lights can only achieve a small range of dimming control. For example, turning off one side street light or intermittently turning off the street light will inevitably bring about changes in the lighting form, which is likely to cause security risks. While solar LED street lights can achieve 0-100% continuous dimming, and can flexibly adjust light output according to ambient lighting and traffic conditions, reduce unnecessary power consumption while ensuring lighting quality.
In terms of light efficiency, high-pressure sodium lamps can now only reach 140 lm/w, and the light efficiency of high-power LEDs has exceeded 250 lm/w. Under laboratory conditions, the LED lamp has reached 400lm/w, and the color rendering index (about 80) of the LED is much higher than that of the high-pressure sodium lamp (about 25).
Under the same illuminance, the white light of the LED solar street light is more helpful for the driver or pedestrian to identify the target, that is, the lighting effect and comfort of the LED street solar light are much higher than that of the high-pressure sodium light.
In addition, the high-pressure sodium lamp uses a spherical light-emitting design, and its efficiency is usually only 70%. Solar street LED lights are directional light, most of the light is directly projected on the road, and the efficiency of the whole LED street lights can reach more than 90%.
Solar LED street outdoor light also has a very key advantage is that it will not cause heavy metal pollution like high-pressure sodium lamps do, which is a new type of environmentally friendly energy-saving light source.